Ag coordination compounds of a bifunctional diaminotriazine–imidazole ligand with various anions and solvents: Synthesis, structures, photoluminescence, and thermal properties

Abstract

Six coordination compounds of Ag(I) and 2,4-diamino-6-[2-(2-methyl-1-imidazolyl)ethyl]-1,3,5-triazine (L, Ag:L = 1:2) with different anions and solvents, namely, [Ag(L)2]∙(NO3)∙4(H2O) (1), [Ag(L)2]·1/2(nds)·(MeOH)·(H2O) (2, H2nds = 1,5-naphthalenedisulfonic acid), [Ag(L)2]·1/2(nds)·(MeOH)·5/2(H2O) (3), [Ag(L)2]·1/2(nds)·(CH3CN) (4), [Ag(L)2]∙(ClO4)∙(MeOH)∙(H2O) (5), and [Ag(L)2]∙(ClO4)∙2(H2O) (6), have been synthesized and characterized by elemental analysis, IR, PXRD and X-ray single-crystal diffraction. In these compounds, each Ag(I) ion is ligated by two imidazole nitrogens to form a Ag(L)2 unit. The anions and solvents determine hydrogen-bonding between the DAT groups links the Ag(L)2 units whether to form chains in 1 and 2 or layers in 3–6. In addition, thermogravimetric analysis (TGA) and luminescent properties of these compounds were also investigated.